How many 'Tyrannosaurus rex' walked the Earth?

Using the incredible wealth of fossil data and a modern ecological theory, researchers estimated population density for the extinct apex predator.

Tyrannosaurus - Wikipedia

Walking with Dinosaurs: Tyrannosaurus rex by TrefRex on DeviantArt

Dinosaurs: Billions of T-Rex once roamed the Earth, scientists say

Explained: What new research tells us about the Tyrannosaurus Rex

Tyrannosaur, Size, Species, & Facts

Posterazzi Tyrannosaurus Rex dinosaur observes a

How Many Tyrannosaurus Rex Walked the Earth?

Tyrannosaurus rex would not have been able to outrun a speedy

How many T. rexes were there? Billions.

Latest Research Shows That Around 2.5 Billion T. Rexes Once Roamed